So in my search to find out why my truck has been feeling like a dog and find the random missfire that occurs, Marc_w came up to help me out and scan my truck with his hp tuners program. We found that the truck is running lean, I have a good bit of knock retard between 1600 and 2800 rpm, and my tps is only opening the throttle 60 percent when I step on it! no wonder it feels like a slug. Marc also read the codes it had stored which were P0300 - Engine Misfire Detected (Immature)
P0461 - Fuel Level Sensor Performance (History) (Immature)
P1172 - Fuel System Rich During Acceleration (Pending) (OLD) (History) (Current) (Immature)
Now my only guess would be that this can fixed by letting Lyndon at westers garage know whats going on and send me a new tune. Marc has all of the recordings from the runs saved on his computer and if he finds time to post it up then maybe some of you pcm junkies can read through it and find out whats going on. I figured if I sent this info to Lyndon it will help him alot in getting the tune for my truck dead on. Let me know what you boys think. And big props to marc for going out of his way to help me, theres no way any of the morons at the dealership would have any idea whats going on. Thanks alot for you imput guys. This site rocks

Alex

 

maybe try putting the stock wires and plugs back in. i put mine back in and the SES light turned off. runs alot better now. it might be a cheap solution.

taylors and bosch plugs are a POS

 

I might have solved the problem and I feel like an idiot not to catch this. The problem with my truck is after a while the tube going to the maf sensor loosens its self from the clamps from rocking back and forth, the 8.1 shakes pretty violently when you rev it. I noticed this when the check engine light came on last night, its about the only thing that has ever triggered a light in this truck. Sure enough the tube was totally disconnected from the maf. I have not had much time to drive it, it seem alot better but who knows. I still have to get it retuned because this thing shifts way to slopy and soft for my taste. I will post those graphs up when Marc email them to me to see what you guys think.

Alex

 

glad to hear it was a cheap, easy fix. always a relief

 

Shoot Alex, I never saw this post!

Yeah, I still have all of the logs here... I can get some screen captures up if anyone wishes. (like the ones with 525ft/lbs of torque being scanned )

How are things running?

 

ahaha ya marc they might like those shots. I still feel like I need to update my tune and clean up the shifts, sometimes it will just flat out start breaking up in the upper rpms like its detonating. The rest of this TM needs to go so I can show you what a big block will do to procomp x-terrains Im gonna have to take you for another beat run marc to show you how this thing normally runs.

Alex